The focus of this project is to develop a new large-volume application for self-cementing coal combustion products, namely in situ stabilization of gravel roads using self-cementing CCPs. Within the reduced scope of the project, the emphasis was placed on assessing the engineering properties of two recycled materials and a natural aggregate. Laboratory experiments were conducted in which a road surface gravel(RSG), a recycled pavement material (RPM), a natural crushed aggregate (Class 5 base) were tested to determine the California bearing ratio (CBR), resilient modulus (Mr),and unconfined compressive strength (UCS). The recycled materials were blended with two fly ash contents (10 and 15%) and three curing times (7, 28, and 56 d). A Class Cfly ash with 0.7% loss on ignition was used. Resilient modulus and unconfined compression strength tests were also conducted after 5 cycles of freezing and thawing to asses the impact of freeze-thaw cycling.
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